Summary
I document a new mechanism for behavioral thermoregulation, not previously described in animals, called reflectance basking. This behavior, described here for Pieris butterflies, involves the use of the wings as solar reflectors that reflect solar radiation onto the body to increase body temperature. Results show that Pieris require thoracic (body) temperature. between 29° and 40° C in order to take off and fly, and achieve these elevated temperatures by basking. Diurnal patterns of population flight activity are closely correlated with patterns of body temperature during basking. Behavioral studies indicate that 1) Pieris orient to solar radiation, 2) they use thermoregulatory postures consistent with reflectance basking, and 3) they do not use the basking postures found in other Pierid butterflies (i.e., the Coliadinae). There are consistent differences in wing angles used in reflectance basking between Pieris in different subgenera. Results are discussed with respect to thermoregulation and wing color in other Pierid butterflies, and suggest that a re-evaluation of the functional significance of melanization in Pieris is needed.
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References
Batschelet E (1981) Circular Statistics in Biology. Academic Press, New York
Casey TM (1981) Behavioral mechanisms of thermoregulation. In: Insect Thermoregulation. J. Wiley and Sons. New York, pp 79–114
Chew F (1975) Coevolution of Pierid butterflies and their Cruciferous foodplants. I. The relative quality of available resources. Oecologia (Berlin) 20:117–127
Douglas MM (1978) The behavioral and biophysical strategies of thermoregulation in temperate butterflies. Dissertation, University of Kansas, Lawrence, Kansas
Kingsolver JG (1983a) Thermoregulation and flight in Colias butterflies: elevational patterns and mechanistic limitations. Ecology 64:534–545
Kingsolver JG (1985b) Ecological significance of flight activity in Colias butterflies: implications for reproductive strategy and population structure. Ecology 64:546–551
Kingsolver JG (1985) Thermoregulatory significance of wing melanization in Pieris butterflies: physics, posture, and pattern. Oecologia (Berlin) 66:546–553
Rawlins JE (1980) Thermoregulation by the black swallowtail butterfly, Papilio polyxenes. Ecology 61:345–357
Wasserthal LT (1975) The role of butterfly wings in regulation of body temperature. J Insect Physiol 21:1921–1930
Watt WB (1968) Adaptive significance of pigment polymorphisms in Colias butterflies. I. Variation of melanin pigment in relation to thermoregulation. Evolution 22:437–458
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Kingsolver, J.G. Thermal ecology of Pieris butterflies (Lepidoptera: Pieridae): a new mechanism of behavioral thermoregulation. Oecologia 66, 540–545 (1985). https://doi.org/10.1007/BF00379347
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DOI: https://doi.org/10.1007/BF00379347